Selina Kyle and her younger sister, Maggie, who has
cystic fibrosis, live in a run down apartment in
Gotham City. To pay the rent and Maggie's medical expenses, she fights for
Carmine Falcone, an underworld mob boss, who stages fights with a group of fighters known as the Leopards. As Maggie's condition worsens, Selina accompanies her to a doctor's appointment whereupon the clinic grows weary of Selina's living situation. After a fight, two police officers along with a social worker raid Selina's apartment. The social worker details the plans to send Maggie to a run down foster home, which infuriates Selina and compels her to attack the group of officers to create a path for Maggie to escape. Before she could do so, a police officer tasers her and renders her unconscious. When Selina comes to, she finds herself in the company of
Talia, one of the leaders of the
League of Assassins, offers to expunge her criminal record if she agrees to fly to
Italy with her. Considering that Selina's assault constitutes her third offense, she will face a hefty prison sentence. With this in mind, she accepts the offer and flies to Italy where she would spend the next two years training to become an assassin. Two years later, Selina returns to Gotham as Holly Vanderhees, a fake identity of a socialite she creates for herself after stealing the personal information of Talia when she fled from the League of Assassins. She moves in across from
Luke Fox, a war veteran who has
post-traumatic stress disorder and who as a result of experiencing racial discrimination, works in conjunction with the Gotham Police Department to rid the city of evil. As she arrives, the Fox family has a display of an artwork that is worth a hefty sum of cash. Selina attends this event as her socialite character, but she leaves it halfway to don her Catwoman outfit. Once the spectacle has concluded, she swoops in and steals the artwork. As she flees the venue, she stumbles into Batwing. She taunts him, and thrashes him while taking a picture of him as she makes away with the valuable. She leaks the photo anonymously to the press to further humiliate Batwing. Selina continues her crime spree unabated before she comes across Poison Ivy during one of her robberies. As she runs into her, she finds herself surrounded by a group of Falcone's cronies. Working with Ivy, she manages to neutralize them. As she continues her spree,
Poison Ivy tags along, demanding a cut of the action. Selina acquiesces and the two work in tandem as they target larger venues. To increase the amount of risk, Selina suggests that Poison Ivy should recruit
Harley Quinn to tag along with them. To entice Quinn, Selina promises to break the Joker out of prison if she partakes in her robberies. As they prepare for another heist, a wraith from the Assassin's, Tigris, stuns Selina and attempts to slay her. Selina escapes with some serious wounds, but this scene arouses the suspicion of her companions. As the stakes increase, Selina and her group stake out their next target at an abandoned warehouse. As they prepare, the tension mounts as Harley becomes impatient with Selina's attempts to stall
the Joker's prison escape and aims her weapons at Selina. Selina attempts to assuage her fears; before she could do so, a group of police officers storm the entrance of the facility. The group makes a headlong dash for the exit, which results in Ivy and Harley successfully escaping from the warehouse. As Selina trails them, she winds up being cornered by some police officers, who manage to detain her. Selena ends up in front of a set of cameras where the chief prosecutor removes Selena's mask, unmasking her true identity. Once Selina is imprisoned, a group of Joker's associates bust her out of her prison. As she escapes from prison, she makes an agreement to meet up within the center of Gotham City to divulge the formula that she gleaned from a scientist that enables the Lazarus Pit, a phenomenon that restores one's wounds. Instead of meeting with the Joker, Selina heads for the hospital where Maggie resides. She escapes from the hospital with Maggie in tow. As she approaches her escape vehicle, Harley Quinn impedes their path. Selina tries to overcome her, but Quinn severely wounds her in the process. Realizing Selina's intentions, Poison Ivy subdues her so that Selina could reach the abandoned warehouse. When Selina arrives at the warehouse, a group of assassins ambush her. Batwing catches a glimpse of this altercation, and taking note of Selina's feeble condition, he lures the two assassins out of the warehouse to buy Selina some time. Selina places Maggie in the Lazarus Pit, which heals her condition. As she does, she passes away. After Batwing finishes off the assassin's he enters to find Selina without a pulse. Poison Ivy converges on this scene and both she and Batwing resolve to put her in the Lazarus Pit. At first, the Pit cleans her wounds, but she still remains unconscious. After Maggie begs for her to wake up, Selina regains consciousness. Once Gotham City's peace has been temporarily restored, Selina allows Maggie to live once again with her foster parents. Selina and Luke hold hands and they agree to become a couple. Afterwards, Selina meets up with Poison Ivy and they decide to live together and to build a new warehouse for themselves. Poison Ivy informs her that the police apprehended Harley Quinn in the aftermath of Selina's prison escape. After her arrest, Harley Quinn has come to her senses and has decided to attend therapy sessions to resolve her problems. ==Characters==